Check the listing for details. 3M 28476 Disc Pad Hub, 2-1/2" Diameter, 5/8"-11 Thread Size. Condition: New. Listed at 21.72 USD. Our eBay Store About Us Contact Us Add to Favorite Sellers 3M 28476 Disc Pad Hub, 2-1/2" Diameter, 5/8"-11 Thread Size 21.72 Disc pad hub has a 5/8"-11 INT threaded metal insert and can be used on 4-1/2" through 9" face plates. Low profile design allows fibre disc to fit inside the guard of tools wih guards. Color: black. Converted form: backup pads, discs. Diameter: 2-1/2". Equipment - machines: right angle grinders, rotary sanders. For use to mount fibre discs and disc pad. Use retainer nuts for discs with center holes. Warning: This product contains chemicals known to the state of California to cause cancer and birth defects or other reproductive harm. Product Details Threaded metal insert fits onto standard rotary sander or right angle grinder Rigid hub provides firm support for fiber disc face plate Versatile hub holds fiber disc face plates of all densities Disc pad hub only-disc pad face plates and fiber discs sold separately Various sizes available for different sized face plates